tree 56f84ad04027cb70b6536118004d519688c89cc6
parent 2d5ba0c71210ff51d58c9d6521ddd47b2953151c
author Martijn Coenen <maco@android.com> 1567626541 +0200
committer Jens Axboe <axboe@kernel.dk> 1569944161 -0600

loop: change queue block size to match when using DIO

The loop driver assumes that if the passed in fd is opened with
O_DIRECT, the caller wants to use direct I/O on the loop device.
However, if the underlying block device has a different block size than
the loop block queue, direct I/O can't be enabled. Instead of requiring
userspace to manually change the blocksize and re-enable direct I/O,
just change the queue block sizes to match, as well as the io_min size.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martijn Coenen <maco@android.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>